Jan Altman

This paper evaluates a smartphone LiDAR app for measuring tree stem diameter and mapping, finding it efficient and accurate with minor software limitations.

The paper introduces deadtrees.earth, an open-access database of high-resolution aerial imagery to map global tree mortality using community-sourced data and machine learning.

This study tests the elevational niche-breadth hypothesis by analyzing habitat specialisation in butterflies and moths along an elevational gradient on Mount Cameroon, finding broader niche breadth at higher elevations for butterflies but not moths.

This paper combines crowdsourced biodiversity data with Earth observation to model plant traits at high resolution, achieving strong predictive power and improving spatial coverage for global trait mapping.